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CVE-2026-1499 – Missing authorization in WP Duplicate plugin leads to arbitrary file upload and pote

CVE-2026-1499 is a critical vulnerability (CVSS 3.1 base score 9.8) affecting the WP Duplicate WordPress plugin in all versions up to and including 1.1.8. The flaw is a missing authorization (capability) check on the process_add_site() AJAX action combined with a path traversal issue in the file upload functionality. An authenticated low-privileged user (subscriber-level) can set an internal option (prod_key_random_id) that enables an unauthenticated attacker to bypass authentication checks and invoke handle_upload_single_big_file() to write arbitrary files to the server. Successful exploitation can lead to remote code execution, full site compromise, deployment of web shells, data theft, and lateral movement within hosting environments.

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IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

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6

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